package com.atzongmaotan.reggie.service.impl;


import com.atzongmaotan.reggie.common.BaseContext;
import com.atzongmaotan.reggie.common.CustomeException;
import com.atzongmaotan.reggie.entity.*;
import com.atzongmaotan.reggie.mapper.OrdersMapper;
import com.atzongmaotan.reggie.service.*;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.toolkit.IdWorker;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.List;
import java.util.Objects;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.stream.Collectors;

/**
 * ClassName:    OrderServiceImpl
 * Package:  com.atzongmaotan.reggie.service.impl
 * Description:
 *
 * @Author: interface
 * @Create: 2024/6/25 - 下午5:02
 * @Version: v1.0
 */
@Service
public class OrdersServiceImpl extends ServiceImpl<OrdersMapper, Orders> implements OrdersService {
    @Autowired
    private ShoppingCartService shoppingCartService;
    @Autowired
    private UserService userService;
    @Autowired
    private AddressBookService addressBookService;
    @Autowired
    private OrderDetailService orderDetailService;
    /**
     * 用户下单
     * @param orders
     */
    @Transactional
    @Override
    public void submitOrder(Orders orders) {
        //当前用户ID
        Long userId = BaseContext.getCurrentUserId();
        //查询当前用户的购物车
        LambdaQueryWrapper<ShoppingCart> shoppingCartQuery = new LambdaQueryWrapper<ShoppingCart>();
        shoppingCartQuery.eq(ShoppingCart::getUserId, userId);
        List<ShoppingCart> shoppingCartList = shoppingCartService.list(shoppingCartQuery);
        if(Objects.isNull(shoppingCartList) || shoppingCartList.size() == 0) {
            throw new CustomeException("购物车为空,不能下单");
        }



        //查询用户信息
        User user = userService.getById(userId);
        //查询地址数据库
        Long addressBookId = orders.getAddressBookId();
        AddressBook addressBook = addressBookService.getById(addressBookId);
        if (Objects.isNull(addressBook)) {
            throw new CustomeException("用户地址信息有误,不能下单");
        }
        //设置订单号
        long orderId = IdWorker.getId();
        orders.setNumber(String.valueOf(orderId));

        AtomicInteger amount = new AtomicInteger(0);
        List<OrderDetail> orderDetailList = shoppingCartList.stream().map(item -> {
            OrderDetail orderDetail = new OrderDetail();
            orderDetail.setOrderId(orderId);
            orderDetail.setNumber(item.getNumber());
            orderDetail.setDishFlavor(item.getDishFlavor());
            orderDetail.setDishId(item.getDishId());
            orderDetail.setSetmealId(item.getSetmealId());
            orderDetail.setName(item.getName());
            orderDetail.setImage(item.getImage());
            orderDetail.setAmount(item.getAmount());
            amount.addAndGet(item.getAmount().multiply(new BigDecimal(item.getNumber())).intValue());
            return orderDetail;
        }).collect(Collectors.toList());

        //向订单表插入一条数据
        orders.setId(orderId);
        orders.setOrderTime(LocalDateTime.now());
        orders.setCheckoutTime(LocalDateTime.now());
        orders.setStatus(2);
        orders.setAmount(new BigDecimal(amount.get()));//总金额
        orders.setUserId(userId);
        orders.setUserName(user.getName());
        orders.setConsignee(addressBook.getConsignee());
        orders.setPhone(addressBook.getPhone());
        orders.setAddress((addressBook.getProvinceName() == null ? "" : addressBook.getProvinceName())
                + (addressBook.getCityName() == null ? "" : addressBook.getCityName())
                + (addressBook.getDistrictName() == null ? "" : addressBook.getDistrictName())
                + (addressBook.getDetail() == null ? "" : addressBook.getDetail()));



        this.save(orders);
        //向订单明细表插入多条数据（购物车选中几条）
        orderDetailService.saveBatch(orderDetailList);
        //清空购物车中当前用户的数据
        shoppingCartService.remove(shoppingCartQuery);
    }
}
